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The correct option is (4) Did she know about the meeting?After "Did," the base form of the verb (know) is used instead of its past (knew) or past participle (known). Hence, "Did she know" is the grammatically correct structure.
The worst case occur in quick sort when _____
Components of Management information system?
Which backup storage method involves backing up data to a remote data center over a network?
Hyper Text Transfer Protocol (HTTP) support
Multipoint topology is
Which of the following is a characteristic of IPv6?
Default value of float variable in an array
Which routing protocol is commonly used within an autonomous system (AS) to determine the best path for data packets?
Which of the following is an example of a software development methodology?
What is the main advantage of Network Attached Storage (NAS) technology?